Wallrock alteration categories and their geochemical signatures in gold-bearing Neoproterozoic granitoids, Batouri gold district, southeastern Cameroon

Enerst Tata, Cheo Emmanuel Suh, Akumbom Vishiti, Elisha Mutum Shemang, Albert Nih Fon, Kevin Ijunghi Ateh, Chombong Nelson Ndimeh

Research output: Contribution to journalArticle

Abstract

Hydrothermally altered granitoids in the Batouri district host gold mineralization. Gold and associated metals occur as disseminated, stockwork and veins. The granitoids range from quartz-alkali granitoids sensu stricto to diorite with various types of wallrock alterations including K-feldspar alteration, sericitization, silicification, and sulfidation/ferruginization. Most gold-bearing samples are extensively brecciated. Gold mineralization is accompanied with sericitization, silicification, and sulfidation/ferruginization alterations. Gold concentrations reach a high of 103.7 ppm. The granitic rocks are sub-alkaline. They show enrichment in the LREE, a negative Eu anomaly and a depletion in the HREE reflecting the breakdown and mobility of the initial plagioclase feldspar bearing HREE during fluid-rock interaction. On multielement variation diagrams, spikes at K, Ba, Pb, and Th are depicted resulting from selective enrichment during alteration. Mass gains/losses during alteration calculated using the immobile element method indicate, amongst others, gains in SiO2 (silicification), K2O (K-feldspar alteration), SO3 and Fe2O3 (sulfidation/ferruginization) with losses in Na2O linked to sericitization. The samples show Pd and Pt as high as 2 ppm. Gold mineralization is associated with wallrock alteration zones with elevated contents of As-Ba-Cu-Pb-Rb-Sr-Zn and Zr due to the neominerals developed during hydrothermal alteration. Au-Ag-Zn defines a potential pathfinder element cluster in the Batouri district
Original languageEnglish
JournalGeochemistry: Exploration, Environment, Analysis
DOIs
Publication statusPublished - 2016

Fingerprint

Bearings (structural)
Gold
gold
silicification
feldspar
mineralization
Rocks
Quartz
Alkalies
diorite
hydrothermal alteration
rock
plagioclase
Metals
diagram
quartz
anomaly
Fluids
fluid
metal

Cite this

@article{18b837694e064d7a91a03f4b190f30cf,
title = "Wallrock alteration categories and their geochemical signatures in gold-bearing Neoproterozoic granitoids, Batouri gold district, southeastern Cameroon",
abstract = "Hydrothermally altered granitoids in the Batouri district host gold mineralization. Gold and associated metals occur as disseminated, stockwork and veins. The granitoids range from quartz-alkali granitoids sensu stricto to diorite with various types of wallrock alterations including K-feldspar alteration, sericitization, silicification, and sulfidation/ferruginization. Most gold-bearing samples are extensively brecciated. Gold mineralization is accompanied with sericitization, silicification, and sulfidation/ferruginization alterations. Gold concentrations reach a high of 103.7 ppm. The granitic rocks are sub-alkaline. They show enrichment in the LREE, a negative Eu anomaly and a depletion in the HREE reflecting the breakdown and mobility of the initial plagioclase feldspar bearing HREE during fluid-rock interaction. On multielement variation diagrams, spikes at K, Ba, Pb, and Th are depicted resulting from selective enrichment during alteration. Mass gains/losses during alteration calculated using the immobile element method indicate, amongst others, gains in SiO2 (silicification), K2O (K-feldspar alteration), SO3 and Fe2O3 (sulfidation/ferruginization) with losses in Na2O linked to sericitization. The samples show Pd and Pt as high as 2 ppm. Gold mineralization is associated with wallrock alteration zones with elevated contents of As-Ba-Cu-Pb-Rb-Sr-Zn and Zr due to the neominerals developed during hydrothermal alteration. Au-Ag-Zn defines a potential pathfinder element cluster in the Batouri district",
author = "Enerst Tata and Suh, {Cheo Emmanuel} and Akumbom Vishiti and Shemang, {Elisha Mutum} and Fon, {Albert Nih} and Ateh, {Kevin Ijunghi} and Ndimeh, {Chombong Nelson}",
year = "2016",
doi = "10.1144/geea2016-017",
language = "English",
journal = "Geochemistry: Exploration, Environment, Analysis",
issn = "1467-7873",
publisher = "Geological Society of London",

}

Wallrock alteration categories and their geochemical signatures in gold-bearing Neoproterozoic granitoids, Batouri gold district, southeastern Cameroon. / Tata, Enerst; Suh, Cheo Emmanuel; Vishiti, Akumbom; Shemang, Elisha Mutum; Fon, Albert Nih; Ateh, Kevin Ijunghi; Ndimeh, Chombong Nelson.

In: Geochemistry: Exploration, Environment, Analysis, 2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Wallrock alteration categories and their geochemical signatures in gold-bearing Neoproterozoic granitoids, Batouri gold district, southeastern Cameroon

AU - Tata, Enerst

AU - Suh, Cheo Emmanuel

AU - Vishiti, Akumbom

AU - Shemang, Elisha Mutum

AU - Fon, Albert Nih

AU - Ateh, Kevin Ijunghi

AU - Ndimeh, Chombong Nelson

PY - 2016

Y1 - 2016

N2 - Hydrothermally altered granitoids in the Batouri district host gold mineralization. Gold and associated metals occur as disseminated, stockwork and veins. The granitoids range from quartz-alkali granitoids sensu stricto to diorite with various types of wallrock alterations including K-feldspar alteration, sericitization, silicification, and sulfidation/ferruginization. Most gold-bearing samples are extensively brecciated. Gold mineralization is accompanied with sericitization, silicification, and sulfidation/ferruginization alterations. Gold concentrations reach a high of 103.7 ppm. The granitic rocks are sub-alkaline. They show enrichment in the LREE, a negative Eu anomaly and a depletion in the HREE reflecting the breakdown and mobility of the initial plagioclase feldspar bearing HREE during fluid-rock interaction. On multielement variation diagrams, spikes at K, Ba, Pb, and Th are depicted resulting from selective enrichment during alteration. Mass gains/losses during alteration calculated using the immobile element method indicate, amongst others, gains in SiO2 (silicification), K2O (K-feldspar alteration), SO3 and Fe2O3 (sulfidation/ferruginization) with losses in Na2O linked to sericitization. The samples show Pd and Pt as high as 2 ppm. Gold mineralization is associated with wallrock alteration zones with elevated contents of As-Ba-Cu-Pb-Rb-Sr-Zn and Zr due to the neominerals developed during hydrothermal alteration. Au-Ag-Zn defines a potential pathfinder element cluster in the Batouri district

AB - Hydrothermally altered granitoids in the Batouri district host gold mineralization. Gold and associated metals occur as disseminated, stockwork and veins. The granitoids range from quartz-alkali granitoids sensu stricto to diorite with various types of wallrock alterations including K-feldspar alteration, sericitization, silicification, and sulfidation/ferruginization. Most gold-bearing samples are extensively brecciated. Gold mineralization is accompanied with sericitization, silicification, and sulfidation/ferruginization alterations. Gold concentrations reach a high of 103.7 ppm. The granitic rocks are sub-alkaline. They show enrichment in the LREE, a negative Eu anomaly and a depletion in the HREE reflecting the breakdown and mobility of the initial plagioclase feldspar bearing HREE during fluid-rock interaction. On multielement variation diagrams, spikes at K, Ba, Pb, and Th are depicted resulting from selective enrichment during alteration. Mass gains/losses during alteration calculated using the immobile element method indicate, amongst others, gains in SiO2 (silicification), K2O (K-feldspar alteration), SO3 and Fe2O3 (sulfidation/ferruginization) with losses in Na2O linked to sericitization. The samples show Pd and Pt as high as 2 ppm. Gold mineralization is associated with wallrock alteration zones with elevated contents of As-Ba-Cu-Pb-Rb-Sr-Zn and Zr due to the neominerals developed during hydrothermal alteration. Au-Ag-Zn defines a potential pathfinder element cluster in the Batouri district

U2 - 10.1144/geea2016-017

DO - 10.1144/geea2016-017

M3 - Article

JO - Geochemistry: Exploration, Environment, Analysis

JF - Geochemistry: Exploration, Environment, Analysis

SN - 1467-7873

ER -